In German it's called Arschbackenoberschenkelabtrennfalte

Linux, or as I've recently taken to calling it, Linux.

Aerospace engineer here. To levitate, the force of the exhausted mass flow (F=ṁ×v) has to equal the pull of gravity (F=m×g) on your body. The gravity of earth is g=9.81N/kg. Wikipedia says the average body mass is 62kg. It also says the bladder capacity of an adult is about 400ml, and I'll assume the density to be 1kg/l. You want to levitate for 2 seconds, so your mass flow needs to be ṁ=0.4kg/2s=0.2kg/s. If you rearrange the equation, you get v=m×g/ṁ=62kg×9.81N/kg/(0.2kg/s)=3041m/s.

So if you manage to pee with a velocity of about 3km/s, you can levitate for 2 seconds with an average sized bladder.

To achive that, your "exhaust" must be clenched to a diameter of about 0.29mm. This gives a cross-section of 0.066mm² or 6.6×10^-8m². Multiply that with the velocity of 3041m/s and you again get your flow of 0.2l/s.

Of course, during those 2 seconds you loose mass and therefore, earth's pull on you gets less and you start to accelerate to about 0.23km/h, reaching a height of 4cm. If you took your special bladder to space, we can use the rocket equation to calculate that this stunt would accelerate you to 3041m/s×ln(62kg/61.6kg)=19.7m/s=71km/h

For a moment I was so confused as to why the European Space Agency is attacking Minecraft servers.

We used Jitsi quite a bit during Covid, I was very happy with it, and I don't remember any complaints from other people.

Oh god, this answer has gotten longer than expected.

How is it? All in all, it's good here. I'm confident that it would be difficult to find a significantly better country to live in. But it's not perfect either and many people fear that it will go downhill from here.

Many parts of industry and research are struggling while a lot of money is pumped into the military. Our infrastructure is mostly still good, but, for example, we're having trouble keeping up with a lot of old bridges nearing the end of their lifespan. The population is getting pretty old as well and healthcare costs are increasing. They are shutting down our local hospital to save costs and shifting the patients to a big new clinic, which is currently being constructed in the next bigger town. Rents and house prices in the big cities are enormous. In the countryside, internet and public transportation is lacking. Many people are dissatisfied with politics, which led to huge gains for the far-right AfD party, especially in the former GDR. They blame immigrants and the EU and the green party. What has always been an issue is bureaucracy. Complex, unflexible regulations and matching civil servants grind many things to a halt. Part of the problem is a refusal to adjust to new, digital processes.

On the positive side: Food is relatively cheap. Some prices have been coming down again since Covid; butter is down to 99ct/250g, pasta to 49ct/500g. Medical or educational debt is unheard of. The mother of the family next door, a Brasilian woman married to a German, just had brain surgery before christmas. l suppose the additional cost for her family was around 70€ (10€ for every day in the hospital). I studied Aerspace Engineering, about 200€ per semester. I have never witnessed any violent crime, nor has any close friend or family member for as long as I have been alive and as far as I know. Same goes for theft. The worst thing I can think of is a class mate back in school who told me he was attacked with a glass bottle and robbed at night at the train station. I'm sure I live in a bubble, but the people I have contact with are honest and have what they need. I recently lost a 50€ bill at one of the social clubs in which I'm active. Instead of pocketing it, someone picked it up and put it on a counter. Then someone else took it and went through the rooms to find the rightful owner. And while the price of the "Deutschland Ticket" is steadily increasing, it is something I really enjoy. It exists since Covid and allows you to use all (non high speed rail) public transportation in the entire country, for now 63€ per month.

Immigration: For a long time, immigration to Germany was not only tolerated, but actively promoted in Greece or Turkey. In the last decade people fled from Northern Africa to Germany, and in the last few years I noticed a lot of Ukrainians for obvious reasons. This of course changes society. No matter what you think of that, our aging population is a problem, and young migrants are a potential solution. Of course there are also criminal people among them, but I don't know the statistics for migrant/long-time-German crime, and I don't notice crime here anyway. If you want to experience crime for yourself, go to Frankfurt central station.

Regarding my town: I live in a small town of about 30000 in Baden-Württemberg in southern Germany. It's not that exciting here, but we have a bunch of schools, an outdoor and indoor swimming pool, at least 5 supermarkets plus a few drug stores, all kinds of doctors, a library, churches and mosques, a skate park and soccer fields, a lot of social clubs and a beautiful old town center. The old town was built around a small mountain. At the top lie the ruins of the old castle, and in the summer after sunset, it becomes an outdoor movie theater. That's part of some bigger festivities each summer. The newest addition to the town is a funny tower built on a mountain of trash, our former landfill. Great for watching the sunset or sunrise, although nightly visits are not officially allowed. We have a stretch of no-speedlimit Autobahn starting here and a train station. The Autobahn takes you to the next bigger city in about 20 minutes, there you can find more fun stuff like night clubs, a normal cinema, an Ikea and a lasertag arena. 40 minutes of train ride brings you to the state capital for even more shopping and night clubs, or to the international Stuttgart airport.

What do I do? I dance at our sports club, I go shooting once or twice a week at our sport shooting club, I like learning languages. We also have what we call a youth research center. I teach electronic circuit design to a group of pupils, others teach software development or mechanical design. I also work on a robotics project together with some university students, and we can use the workshop and tools for our own projects as well. Doesn't cost anything to the students, everything sponsored by local companies, foundations and the government. This youth research center is btw sandwiched between housing for migrants and asylum seekers. I'm there twice a week, and I haven't seen or heard about any problem during the last ten+ years. The only thing noticable is lots of playing kids and really good smelling food being cooked.

The horizontal bar is commonly used to indicate ground, meaning the part of your circuit you define to be at 0V. So they are all connected, yes.

I've never seen a capacitor symbol with a dot until now. I only know them on transformer symbols where they are used to denote polarity.

Deutschland (seit 2008) und die meisten umgebenden Länder sind dank Impfködern tatsächlich tollwutfrei, abgesehen von Fledermaustollwut :)

I also daily use Firefox, Thunderbird, VSCodium, Signal, KeepassXC, DAVx5 and Radicale for calendar syncronization.

What I don't use each and every day but what are among my favorite FOSS projects are KiCad for electronics design and CoMaps for navigation.

You make a copy of the code ("fork") for yourself, make edits, then request that your changes be accepted into the original project ("pull/merge request"). Someone from the project has to check the edits, make that decision and hit accept or decline.

I noticed that you use digitalWrite multiple times for each transmitted pixel. That function is pretty slow - you should instead manipulate the microcontrollers registers directly for maximum performance. If you are using an Arduino, this article will help: https://roboticsbackend.com/arduino-fast-digitalwrite/

I've often met people from the FSFE at the usual IT centric events in Europe, most recently in Tübingen, Germany at the Digital Freedom Days, but also for example at FOSDEM in Belgium. The FSF itself doesn't seem to exist here, at least I've never encountered them anywhere.

I'm not sure about the standard - but in my experience, if a PD trigger IC requests 12V, that will be supplied, no matter the current draw. I have used this to power several low power devices, for example a 12V computer fan, and I have also verified this with no load at all. There is also PD PPS, which could be used to deliver 14V or any other voltage.

Edit: I normally use this kind of trigger board, they are available everywhere online.

I don't know much about lasers. Also, I don't entirely understand your schematic. What is connected to J5 and J6?

That being said, my first thought is: Why you are using an NPN transistor for high-side switching? I would try switching it out for a PNP. If that still does not work, then a p-channel MOSFET. There are more than enough FETs btw that don't need any external driver for use with an Arduino, or even with 3.3V systems.

https://umap.openstreetmap.de/en/

None. Those things are incompatible with each other.

tl;dr: I'm reasonably sure this will work as is.

The following comments involving my personal opinions might be most useful for more complex projects:

While I also try to isolate building blocks in my schematics, I think it's sometimes beneficial to have some visible connections using wires. Your schematic isn't very complex, but I still needed to jump around a bit to understand how current flows from the USB connection to the output. I would arrange the building blocks so that current flows from left to right and include one wire that starts at the USB jack, passes by the CH224K and its bypass cap, through the FET to the terminal block, so you can read the current flow like you would a line of text.

Layout:

• Before manufacturing, better before starting the layout, I would include the design rules of your manufacturer under File > Board Setup > Design Rules > Constraints. Currently you haven't defined minimal clearances, widths etc. Google "[your preferred manufacturer] capabilities". You might also find existing KiCad templates that you can import.
• I would place the reference designators on the silkscreen so they are visible after assembly, to help with debugging and repairability.
• I would also take care that everything you want to show is legible; currently, your JP-labels overlap U1
• To find enough room on the silkscreen, you could probably reduce your text size. Look up the minimum in your manufacturer capabilities; in addition to putting those values into your design rules, you can also add them in File > Board Setup > Text & Graphics > Defaults > Silk Layers. Apart from that being the new standard, you can then also easily go to Edit > Edit Text & Graphics Properties to set all existing reference designators to those new default values. In my personal experience (with JLCPCB at least), the text also stays legible waayyy below the quoted minimum size.
• I make it a point to include some metadata on all my PCBs; a version number, date, a project title and the name of the designer, so I don't confuse myself or others when the PCB is found some years later in a random box.
• I like your package size for the resistors and caps, but if you have space issues, you will probably have no issue soldering the smaller 0805 packages by hand either. We regularly have discussions what size can be comfortably soldered by hand without magnification; one of my colleagues insists that even 0603 is "comfortable".
• EDIT: Your trace from the capacitor to the VDD pin of the IC is a bit long. It will work, but it would be better to place the capacitor as close to the IC as physically possible, so that the area enclosed by the loop "Cap.+ -> IC.VDD -> IC.GND -> Cap.GND -> Cap.+" is minimized. Something like this:

Regarding both the schematic and layout: run the ERC/DRC and fix all errors and warnings. Most of it is noise, but hidden beneath that, serious issues can hide. Be sure that you don't miss anything important there.

Another idea that might be out of scope for your project: You could add optional 5.1k pull-down resistors on the CC lines and a solder jumper from VBUS to VOUT. Then you could use the board even without the CH224K and the FET if you only need 5V.

Ich kann das nicht unkommentiert lassen! https://de.wikipedia.org/wiki/Leerzeichen_in_Komposita